Title: Warning failed
Last modified: January 8, 2020

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# Warning failed

 *  Resolved [sokiwa](https://wordpress.org/support/users/sokiwa/)
 * (@sokiwa)
 * [6 years, 5 months ago](https://wordpress.org/support/topic/warning-failed/)
 * Hello,
    first of all thank you very much for your work, your plugin is fantastic.
   I use and recommend, I will now contribute financially. Only I have a problem
   on one of my sites, updated to Wp 5.3.2, with a PHP version of 7.3. Here are 
   the error messages I get when I click the Duplicate button:
 * Warning: preg_match (): Compilation failed: invalid ranks in character class 
   at offset 11 in /homepages/12/d777983586/htdocs/lacordeelyon/wp-content/plugins/
   js_composer/include/autoload/hook-vc-grid.php on line 163
 * Warning: Can not modify header information – headers already sent by (output 
   started at /homepages/12/d777983586/htdocs/lacordeelyon/wp-content/plugins/js_composer/
   include/autoload/hook-vc-grid.php:163) in / homepages / 12 / d777983586 / htdocs/
   lacordeelyon / wp-includes / pluggable.php on line 1265
 * Warning: Can not modify header information – headers already sent by (output 
   started at /homepages/12/d777983586/htdocs/lacordeelyon/wp-content/plugins/js_composer/
   include/autoload/hook-vc-grid.php:163) in / homepages / 12 / d777983586 / htdocs/
   lacordeelyon / wp-includes / pluggable.php on line 1268
 * Here are all the plugins I use:
    BackWPup / Contact Form 7 / Contact Form 7 Captcha/
   MailPoet 3 (new) / Timetable Responsive Schedule For WordPress / Yoast SEO / 
   Page Editor (WPBakery.com)

Viewing 1 replies (of 1 total)

 *  Plugin Author [Enrico Battocchi](https://wordpress.org/support/users/lopo/)
 * (@lopo)
 * [6 years, 5 months ago](https://wordpress.org/support/topic/warning-failed/#post-12306334)
 * Hi [@sokiwa](https://wordpress.org/support/users/sokiwa/),
    sorry to hear that.
   Seems an issue with the page editor you’re using. Does it happen for every post,
   or just the ones having a certain type of Visual Composer block? The Page Editor(
   WPBakery.com) is bundled with your theme? which version are you using? Let me
   know!

Viewing 1 replies (of 1 total)

The topic ‘Warning failed’ is closed to new replies.

 * ![](https://ps.w.org/duplicate-post/assets/icon-256x256.png?rev=2336666)
 * [Yoast Duplicate Post](https://wordpress.org/plugins/duplicate-post/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/duplicate-post/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/duplicate-post/)
 * [Active Topics](https://wordpress.org/support/plugin/duplicate-post/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/duplicate-post/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/duplicate-post/reviews/)

 * 1 reply
 * 2 participants
 * Last reply from: [Enrico Battocchi](https://wordpress.org/support/users/lopo/)
 * Last activity: [6 years, 5 months ago](https://wordpress.org/support/topic/warning-failed/#post-12306334)
 * Status: resolved